Audi 80/Avant (B4)

since 1991-1995 of release

Repair and car operation

Audi 80/Avant
+ Technical specification
+ Engines
+ System of production of the fulfilled gases
- Cooling system
   Check of level of cooling liquid
   Frost resistance check
   Check of system of cooling on tightness
   Carving cover of a broad tank
   List of malfunctions
   Water pump
   Maple belt of the water pump
   Fan of system of cooling
   Malfunctions of the fan of system of cooling
   List of malfunctions
+ Fuel tank and fuel pump
+ Air filter and airintaking channels
+ injection System
+ Coupling
+ Transmission and transmission
+ Suspension bracket and steering
+ Brake system
+ Anti-blocking system of brakes
+ Wheels and tires
+ Body electrosystem
+ ignition System
+ Lighting
+ Signalling devices
+ Devices and auxiliary devices
+ Heating and ventilation
+ body Elements
+ Search of malfunctions
+ Specifications

Памятники в виде часовни и еще.
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Frost resistance check

The special device is necessary for check of frost resistance of cooling liquid – the areometer for you. It measures specific weight of liquid. Because of various means of protection from corrosion specific weight of additives to protection against freezing are not identical. For safety it is necessary to take away also the admission 2 — 3°С.


  1. To gather a little cooling liquid from a broad tank in the areometer.
  2. The areometer plunges on different depth depending on specific weight of liquid.
  3. On a scale it is possible to see, to what temperature protection against freezing suffices.
  4. Some of devices for determination of frost resistance are supplied with an arrow which specifies frost resistance degree.

In drawing it is shown, how for determination of frost resistance concentration of cooling liquid is defined by the device.

Control of concentration of antifreeze

In most cases it appears that concentration of cooling liquid is already insufficient. Then it is necessary to add a little means from freezing; by rough calculations about 1/4 l on everyone 10°С norms are lower.


  1. To remove the bottom protection of a motor compartment (head body Elements).
  2. To substitute under the car any capacity.
  3. To open a drain stopper below on a radiator or to remove the bottom tube on a radiator, to lower 1 — 2 l of cooling liquid.
  4. Again to establish a tube or without pressing to tighten a stopper.
  5. To add the corresponding quantity of undiluted means from freezing and to add collected cooling liquid from capacity.